CN111790802A - Offset reverse spinning processing technology for thin-wall cylindrical part - Google Patents
Offset reverse spinning processing technology for thin-wall cylindrical part Download PDFInfo
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- CN111790802A CN111790802A CN202010705631.9A CN202010705631A CN111790802A CN 111790802 A CN111790802 A CN 111790802A CN 202010705631 A CN202010705631 A CN 202010705631A CN 111790802 A CN111790802 A CN 111790802A
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- cylindrical part
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
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Abstract
The invention discloses a staggered reverse spinning processing technology for a thin-wall cylindrical part, which relates to the technical field of thin-wall cylindrical part processing, and comprises the following steps: (1) preparing a thin-wall cylindrical part blank; (2) clamping the core rod; (3) clamping a thin-wall cylindrical part blank; (4) carrying out primary staggered reverse spinning; (5) secondary staggered reverse spinning; (6) carrying out third-time staggered reverse spinning; (7) four times of staggered reverse spinning; (8) and (5) carrying out reverse spinning at five staggered pitches. The invention ensures that the radial stress of the blank is on the circumference of the same radius in the processing process, the wall thickness of the product is more uniform, the fluidity of the material is better, the surface smoothness of the product is high, the roundness of the product is high, and the quality of the product is improved; the original work which can be finished by a plurality of working procedures can be finished by staggered reverse spinning each time, the production efficiency is improved, and the processing cost is reduced.
Description
Technical Field
The invention relates to the technical field of thin-wall cylindrical part machining, in particular to a staggered reverse spinning machining process for a thin-wall cylindrical part.
Background
The traditional processing method of the thin-wall cylindrical part is a drawing, thinning and spinning mode, so that the processed product has the problems of uneven wall thickness, large roundness deviation and poor surface smoothness, and the quality of the product is low; and the processing process needs tempering and destressing for many times, the working procedures are various, and the processing cost is higher.
Disclosure of Invention
The invention aims to solve the problems and provide a staggered reverse spinning process for a thin-wall cylindrical part.
The invention realizes the purpose through the following technical scheme:
an offset reverse spinning process for a thin-wall cylindrical part, which comprises the following steps:
(1) preparing a thin-wall cylindrical part blank, selecting No. 10 steel, and forging the No. 10 steel into the thin-wall cylindrical part blank, wherein the surface of the thin-wall cylindrical part blank is required to have no defects of folding, iron oxide scale and cracks;
(2) clamping a core rod, wherein the core rod is placed in a chuck of a horizontal spinning machine to be clamped and fixed, the length of the core rod is greater than that of a thin-wall cylindrical part blank to be processed, a first spinning wheel is arranged on one side of the core rod, and a second spinning wheel is arranged on the other side of the core rod;
(3) clamping a thin-wall cylindrical part blank, sleeving the thin-wall cylindrical part blank obtained in the step (1) on a core rod, and fixing the thin-wall cylindrical part blank on the core rod by propping the end part of the thin-wall cylindrical part blank against the tail of a horizontal spinning machine, wherein the thin-wall cylindrical part blank cannot shake;
(4) carrying out one-time offset reverse spinning, keeping the rotating speed of the core rod at 800r/min, enabling the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, enabling the staggering distance between the first spinning wheel and the second spinning wheel to be simultaneously used for reverse spinning, and enabling the pressing amount of the first spinning wheel and the pressing amount of the second spinning wheel to be 1.5mm, so that the thickness of a thin-wall cylindrical part blank is reduced, and the length of the thin-wall cylindrical part blank is extended;
(5) secondary offset reverse spinning is carried out, the rotating speed of the mandrel is kept to be 800r/min, the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel are both 200mm/min, the first spinning wheel and the second spinning wheel are staggered by a distance and are simultaneously subjected to reverse spinning, the pressing amount of the first spinning wheel and the pressing amount of the second spinning wheel are both 1.0mm, the thickness of the thin-wall cylindrical part blank is further reduced, and the length of the thin-wall cylindrical part blank is continuously extended;
(6) thirdly, carrying out offset reverse spinning, keeping the rotating speed of the core rod at 800r/min, enabling the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, enabling the staggered distance between the first spinning wheel and the second spinning wheel to be simultaneously and reversely spun, and enabling the pressing amount of the first spinning wheel and the second spinning wheel to be 1.0mm, so that the appearance of the thin-wall cylindrical part blank is basically formed;
(7) four times of offset reverse spinning, the rotating speed of the mandrel is kept to be 800r/min, the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel are both 200mm/min, the first spinning wheel and the second spinning wheel are staggered by a distance and are simultaneously subjected to reverse spinning, the pressing amount of the first spinning wheel and the second spinning wheel is 0.5mm, and the overall dimension of the thin-wall cylindrical part is trimmed;
(8) and (3) carrying out reverse spinning at the staggered distance of five times, keeping the rotating speed of the core rod at 800r/min, keeping the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, carrying out reverse spinning at the staggered distance of the first spinning wheel and the second spinning wheel, ensuring the size of the thin-wall cylindrical part, improving the precision of the thin-wall cylindrical part and obtaining a finished thin-wall cylindrical part product, wherein the pressing amount of the first spinning wheel and the second spinning wheel is 0.5 mm.
Preferably, the wall thickness of the thin-wall cylindrical part blank in the step (1) is 5.5mm, and the inner diameter of the thin-wall cylindrical part blank is 49 mm.
Preferably, the runout of the core rod in the step (2) is less than 0.05 mm.
Preferably, in the step (2), the radius of the rotation angle of the first rotating wheel and the radius of the rotation angle of the second rotating wheel are both 6mm, and the exit angle of the first rotating wheel and the exit angle of the second rotating wheel are both 45 degrees.
Preferably, the thickness reduction amount of the thin-wall cylindrical part blank in the step (4) is 1.5mm, and the length extension amount is 18 mm.
Preferably, cold spinning is used in steps (4), (5), (6), (7) and (8).
Preferably, the radial offset distance between the first rotating wheel and the second rotating wheel in the steps (4), (5), (6), (7) and (8) is 1mm, and the axial offset distance is 20 mm.
The invention has the beneficial effects that: the invention adopts the offset reverse spinning processing technology, ensures that the radial stress of the blank is on the circumference of the same radius in the processing process, the wall thickness of the product is more uniform, the fluidity of the material is better, the problem of material surface accumulation can not occur, the surface smoothness of the product is high, the roundness of the product is high, and the quality of the product is improved; the work which can be finished by a plurality of working procedures originally can be finished by staggered reverse spinning every time, the production efficiency is improved, and the processing cost is reduced; the processing technology improves the utilization rate of materials.
Drawings
FIG. 1 is a schematic view of a spinning process of the present invention;
FIG. 2 is a schematic view of the spinning wheel of the present invention;
FIG. 3 is a schematic view of a thin-walled cylindrical member blank of the present invention;
fig. 4 is a schematic view of the thin-walled cylindrical member molding of the present invention.
Wherein: 1. carrying out tail jacking; 2. a first spinning wheel; 3. a thin-walled cylindrical member; 4. a core rod; 5. a horizontal spinning machine; 6. a second spinning wheel.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
the offset reverse spinning processing technology comprises the following steps: (1) as shown in fig. 3, a thin-wall cylindrical part blank is prepared, steel No. 10 is selected, then the steel No. 10 is forged and processed into the thin-wall cylindrical part blank, the thin-wall cylindrical part blank requires that the surface does not have the defects of folding, iron scale and cracks, the wall thickness of the thin-wall cylindrical part blank is 5.5mm, and the inner diameter of the thin-wall cylindrical part blank is 49 mm. (2) As shown in fig. 1, a core rod 4 is clamped, the core rod 4 is placed in a chuck of a horizontal spinning machine 5 and clamped and fixed, the runout of the core rod 4 is less than 0.05mm, the length of the core rod 4 is greater than that of a blank of a thin-walled cylindrical part 3 to be processed, a first spinning wheel 2 is arranged on one side of the core rod 4, a second spinning wheel 6 is arranged on the other side of the core rod 4, as shown in fig. 2, the radius of the spinning angles of the first spinning wheel and the second spinning wheel are both 6mm, and the exit angles of the first spinning wheel and the second spinning wheel are both 45 °. (3) As shown in fig. 1, a thin-wall cylindrical part 3 blank is clamped, the thin-wall cylindrical part 3 blank obtained in the step (1) is sleeved on a core rod 4, the end part of the thin-wall cylindrical part 3 blank is propped against the thin-wall cylindrical part 3 blank by a tail jack 1 of a horizontal spinning machine 5, the thin-wall cylindrical part 3 blank is fixed on the core rod 4, and the thin-wall cylindrical part 3 blank cannot shake. (4) Carrying out one-time offset reverse spinning, keeping the rotating speed of the core rod at 800r/min, keeping the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, carrying out reverse spinning on the first spinning wheel and the second spinning wheel at the same time of staggering distance, and keeping the pressing amount of the first spinning wheel and the second spinning wheel to be 1.5mm, so that the thickness of the thin-wall cylindrical part blank is reduced, the length of the thin-wall cylindrical part blank is extended, the thickness reduction amount of the thin-wall cylindrical part blank is 1.5mm, and the length extension amount of the thin-wall cylindrical part blank is 18 mm; (5) secondary offset reverse spinning is carried out, the rotating speed of the mandrel is kept to be 800r/min, the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel are both 200mm/min, the first spinning wheel and the second spinning wheel are staggered by a distance and are simultaneously subjected to reverse spinning, the pressing amount of the first spinning wheel and the pressing amount of the second spinning wheel are both 1.0mm, the thickness of the thin-wall cylindrical part blank is further reduced, and the length of the thin-wall cylindrical part blank is continuously extended; (6) thirdly, carrying out offset reverse spinning, keeping the rotating speed of the core rod at 800r/min, enabling the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, enabling the staggered distance between the first spinning wheel and the second spinning wheel to be simultaneously and reversely spun, and enabling the pressing amount of the first spinning wheel and the second spinning wheel to be 1.0mm, so that the appearance of the thin-wall cylindrical part blank is basically formed; (7) four times of offset reverse spinning, the rotating speed of the mandrel is kept to be 800r/min, the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel are both 200mm/min, the first spinning wheel and the second spinning wheel are staggered by a distance and are simultaneously subjected to reverse spinning, the pressing amount of the first spinning wheel and the second spinning wheel is 0.5mm, and the overall dimension of the thin-wall cylindrical part is trimmed; (8) and (3) carrying out five times of offset reverse spinning, keeping the rotating speed of the core rod at 800r/min, keeping the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, carrying out reverse spinning on the first spinning wheel and the second spinning wheel at the same time of staggering distance, ensuring the size of the thin-wall cylindrical part and improving the precision of the thin-wall cylindrical part, wherein the pressing amount of the first spinning wheel and the second spinning wheel is 0.5mm, and obtaining a finished thin-wall cylindrical part product as shown in figure 4. In this example, cold spinning is used in steps (4), (5), (6), (7) and (8). In the steps (4), (5), (6), (7) and (8), the radial offset distance between the first rotating wheel and the second rotating wheel is 1mm, and the axial offset distance is 20 mm.
Tests prove that the straightness of the finished thin-wall cylindrical part is improved by 10% under the parameters, and the roundness of the product is controlled within 0.05 mm.
The invention can be suitable for processing thin-wall cylindrical parts made of any materials and in any length and size, and has wide application range.
The above are only preferred embodiments of the present invention, and do not limit the scope of the claims of the present invention. Those skilled in the art will appreciate that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the claims and their equivalents.
Claims (7)
1. A staggered reverse spinning processing technology for a thin-wall cylindrical part is characterized by comprising the following steps: the spinning processing technology comprises the following steps:
(1) preparing a thin-wall cylindrical part blank, selecting No. 10 steel, and forging the No. 10 steel into the thin-wall cylindrical part blank, wherein the surface of the thin-wall cylindrical part blank is required to have no defects of folding, iron oxide scale and cracks;
(2) clamping a core rod, wherein the core rod is placed in a chuck of a horizontal spinning machine to be clamped and fixed, the length of the core rod is greater than that of a thin-wall cylindrical part blank to be processed, a first spinning wheel is arranged on one side of the core rod, and a second spinning wheel is arranged on the other side of the core rod;
(3) clamping a thin-wall cylindrical part blank, sleeving the thin-wall cylindrical part blank obtained in the step (1) on a core rod, and fixing the thin-wall cylindrical part blank on the core rod by propping the end part of the thin-wall cylindrical part blank against the tail of a horizontal spinning machine, wherein the thin-wall cylindrical part blank cannot shake;
(4) carrying out one-time offset reverse spinning, keeping the rotating speed of the core rod at 800r/min, enabling the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, enabling the staggering distance between the first spinning wheel and the second spinning wheel to be simultaneously used for reverse spinning, and enabling the pressing amount of the first spinning wheel and the pressing amount of the second spinning wheel to be 1.5mm, so that the thickness of a thin-wall cylindrical part blank is reduced, and the length of the thin-wall cylindrical part blank is extended;
(5) secondary offset reverse spinning is carried out, the rotating speed of the mandrel is kept to be 800r/min, the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel are both 200mm/min, the first spinning wheel and the second spinning wheel are staggered by a distance and are simultaneously subjected to reverse spinning, the pressing amount of the first spinning wheel and the pressing amount of the second spinning wheel are both 1.0mm, the thickness of the thin-wall cylindrical part blank is further reduced, and the length of the thin-wall cylindrical part blank is continuously extended;
(6) thirdly, carrying out offset reverse spinning, keeping the rotating speed of the core rod at 800r/min, enabling the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, enabling the staggered distance between the first spinning wheel and the second spinning wheel to be simultaneously and reversely spun, and enabling the pressing amount of the first spinning wheel and the second spinning wheel to be 1.0mm, so that the appearance of the thin-wall cylindrical part blank is basically formed;
(7) four times of offset reverse spinning, the rotating speed of the mandrel is kept to be 800r/min, the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel are both 200mm/min, the first spinning wheel and the second spinning wheel are staggered by a distance and are simultaneously subjected to reverse spinning, the pressing amount of the first spinning wheel and the second spinning wheel is 0.5mm, and the overall dimension of the thin-wall cylindrical part is trimmed;
(8) and (3) carrying out reverse spinning at the staggered distance of five times, keeping the rotating speed of the core rod at 800r/min, keeping the axial and radial feeding speeds of the first spinning wheel and the second spinning wheel to be 200mm/min, carrying out reverse spinning at the staggered distance of the first spinning wheel and the second spinning wheel, ensuring the size of the thin-wall cylindrical part, improving the precision of the thin-wall cylindrical part and obtaining a finished thin-wall cylindrical part product, wherein the pressing amount of the first spinning wheel and the second spinning wheel is 0.5 mm.
2. The offset reverse spinning process for thin-walled cylinders of claim 1, wherein: in the step (1), the wall thickness of the thin-wall cylindrical part blank is 5.5mm, and the inner diameter of the thin-wall cylindrical part blank is 49 mm.
3. The offset reverse spinning process for thin-walled cylinders of claim 1, wherein: the jumping of the core rod in the step (2) is less than 0.05 mm.
4. The offset reverse spinning process for thin-walled cylinders of claim 1, wherein: in the step (2), the radius of the rotation angle of the first rotating wheel and the radius of the rotation angle of the second rotating wheel are both 6mm, and the exit angle of the first rotating wheel and the exit angle of the second rotating wheel are both 45 degrees.
5. The offset reverse spinning process for thin-walled cylinders of claim 1, wherein: in the step (4), the thickness reduction amount of the thin-wall cylindrical part blank is 1.5mm, and the length extension amount is 18 mm.
6. The offset reverse spinning process for thin-walled cylinders of claim 1, wherein: and (4), cold spinning is adopted in the steps (5), (6), (7) and (8).
7. The offset reverse spinning process for thin-walled cylinders of claim 1, wherein: in the steps (4), (5), (6), (7) and (8), the radial offset distance between the first rotating wheel and the second rotating wheel is 1mm, and the axial offset distance is 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705631.9A CN111790802A (en) | 2020-07-21 | 2020-07-21 | Offset reverse spinning processing technology for thin-wall cylindrical part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705631.9A CN111790802A (en) | 2020-07-21 | 2020-07-21 | Offset reverse spinning processing technology for thin-wall cylindrical part |
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| Publication Number | Publication Date |
|---|---|
| CN111790802A true CN111790802A (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010705631.9A Withdrawn CN111790802A (en) | 2020-07-21 | 2020-07-21 | Offset reverse spinning processing technology for thin-wall cylindrical part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719016A (en) * | 2020-12-20 | 2021-04-30 | 西安航天动力机械有限公司 | Method for determining fillet radius of spinning roller of two spinning rollers of cylindrical part |
| CN112756459A (en) * | 2020-12-20 | 2021-05-07 | 西安航天动力机械有限公司 | Method for determining fillet radius of internal and external spinning wheels in spinning of cylindrical part |
-
2020
- 2020-07-21 CN CN202010705631.9A patent/CN111790802A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719016A (en) * | 2020-12-20 | 2021-04-30 | 西安航天动力机械有限公司 | Method for determining fillet radius of spinning roller of two spinning rollers of cylindrical part |
| CN112756459A (en) * | 2020-12-20 | 2021-05-07 | 西安航天动力机械有限公司 | Method for determining fillet radius of internal and external spinning wheels in spinning of cylindrical part |
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Application publication date: 20201020 |